What is the safe voltage range, under 36v?
I think (and used at higher voltage >60Volt) that the input voltage is not an great problem,
but the spikes on the gate (depending on the input voltage???) are more an problem and risk.
So a 15 volt Zener over gate-source is recommended.
Use the unit mostly to test batteries and powersupply with Testcontroller.
Normaly I don't go further than 80 Watts and I check the Temperature with Testcontroller,
wich I let shut it down when it goes too high.
For the price I like the DL24. When used with some attention it works fine.
You can do calibration, but even without doing that it was pretty accurate.
Maybe somebody need extreme currents and so on, but would and should you do that?
![Huh? ???](https://www.eevblog.com/forum/Smileys/default/huh.gif)
?
After replacing the Mosfet with an original one and adding an Zener, I like using the unit.
BTW. The earlier PX100, recent ones (version 2.4 and higher), with replaced MOSFet and Zener,
also working fine. But there are fakes on the market, which are dangerous and worthless.